by Mandrake » Nov 3rd, '04, 17:47
PM's will stay there until the person you address them to opens them up and reads them. If they log on, take no notice of the PM's and log off again, the message will still be in your outbox. I have one still waiting to be read from July this year - the person it was addressed to hasn't been back so I may have to just delete it.
Try e-mailing the addressee and telling them there's a message.